Cimbing Hold Troubles
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So, me and my dad are almost done building our basement bouldering wall. We recently finished installing T-nuts in one of the panels. I tried bolting a few holds to the wall and most went on fine, however, two small metolius holds kept on swiveling. I tried tightening the bolts( to the safe maximum) but That did not do anything. So any Idea what the problem is and any possible solutions? |
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You have to match the bolt to the hold. Some holds have a tapered hole that fit the screws you show and some have a flat washer at the base and need a flat based head to seat properly. |
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Usually it is because the friction on the bolt is greater than the friction on the wall. So you can glue some sandpaper to the back of the hold, or try lubricating the bolt. |
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It's not the t-nut that's spinning, is it? Sometimes if they don't get pounded in deep, a poor threading can push them back out before they get tight. I've always dabbed a touch of liquid nails caulk on each t-nut to lock them down to the wood, especially if I can't get behind the wall to fix it. Otherwise all above ideas are good. Match the right bolt' if it spins on the smooth board, I use a small patch of that flex-mesh rubber shelf liner, and glue it to the back of the hold to soften the contact and add friction usually works just right. |
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It looks like from the photo both of the suspect Metolius holds have smaller holes in them, to the side of the main bolt hole. Have you tried putting a smaller woodscrew through those secondary holes? I've definitely done that to larger macro holds to keep them from spinning, though I would not think it necessary to do to such small holds. |
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I saw in your other thread that you tung-oiled the plywood sheets. mountainproject.com/v/gener… |
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Evan1984 wrote:You have to match the bolt to the hold. Some holds have a tapered hole that fit the screws you show and some have a flat washer at the base and need a flat based head to seat properly. If you mix them up, they'll likely crack the hold before you get it tight enough.Also as Evan mentioned above it is extremely important to have the right screw/hold combos. To tell the holds with a visible metal washer inside of them generally take the large 3/8" hex bolt. The ones without the metal washer (and usually are small holds) take the flared bolt that you have pictured. I only say this because looking at the Brown wing hold on the right side it looks like the incorrect bolt may be in that hold. It just looks like the bolt is sticking too far out of the hold from the picture; however it just may be the picture and the hold is fine. |
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the trouble might also be with your panels... linseed oil coated smooth plywood sounds pretty slippery to me. I like the previous suggestion of gluing sandpaper to the back of the holds, or using sticky back sandpaper. |
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Another good trick to keep the hold from spinning is to cut up a bike inner-tube into squares and slip a couple of them between the hold and the wall. |